Negative spectral index of f(NL) in the axion-type curvaton model

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	Negative spectral index of f(NL) in the axion-type curvaton model
	Huang, Qing-Guo; Huang, QG , Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2010
期号	11 页码:-
关键词	Non-gaussianity Scalar Field Perturbations Inflation Scenario Fluctuations
ISSN号	1475-7516
英文摘要	We derive the spectral index of f(NL) and its running from isocurvature single field and investigate the curvaton models with a negative spectral index of f(NL) in detail. In particular, a numerical study of the axion-type curvaton model is illustrated, and we find that the spectral index of f(NL) is negative and its absolute value is maximized around sigma(*) = pi f/2 for the potential V (sigma) = m(2)f(2)(1 - cos sigma/f). The spectral index of f(NL) can be O(-0.1) for the axion-type curvaton model. A convincing detection of a positive n(fNL) will rule out the axion-type curvaton model. In addition, we also give a general discussion about the detectable parameter space for the curvaton model with a polynomial potential.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000284825100026
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5023]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Huang, QG , Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Huang, Qing-Guo,Huang, QG , Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China. Negative spectral index of f(NL) in the axion-type curvaton model[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(11):-.
APA	Huang, Qing-Guo,&Huang, QG , Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.(2010).Negative spectral index of f(NL) in the axion-type curvaton model.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(11),-.
MLA	Huang, Qing-Guo,et al."Negative spectral index of f(NL) in the axion-type curvaton model".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .11(2010):-.